Backpack



FIG. 1 is a top, left side, perspective view of a backpack showing our new design, the fragmentary broken line showing the straps and slide fastener pull being for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, the left side elevational view being a mirror image thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a backpack, as shown and described. 